Transforming Technologies Comfort Dome ESD Anti-Fatigue floor runner is a 100% conductive rubber molded dome that provides unparalleled comfort in areas where static control is a concern. Evenly spaced domes on the surface of the mat provides superior anti-fatigue relief and slip resistance. Create any length mat you desire in multiples of 4'. Size 3'x4' - Center piece for interlocking sections for long assembly lines. This will require part number FM53X4EP to complete matting.